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Home >> Lexus >> 2025 >> NX 250 FWD >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Engine Cooling System - Service Information >> FLOW SHUTTING VALVE (for Heater) >> Installation [11/2021 - ] >> Procedure

Installation [11/2021 - ]: Procedure

  1. INSTALL FLOW SHUTTING VALVE (WATER BY-PASS HOSE ASSEMBLY) 
    1. GTY1078792Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a View A *b 90°
      *c Upper Side *d RH Side
      *e 2 to 7 mm (0.0787 to 0.276 in.) - -
      1. Connect the flow shutting valve (water by-pass hose assembly) to the transmission oil cooler and slide the clip to secure it.
        NOTE:
        • Make sure to slide the flow shutting valve (water by-pass hose assembly) until it contacts the hose stopper of the transmission oil cooler.
        • Make sure that the tabs of the clip are within the area shown in the illustration.
    2. GTY1078212Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a View A *b 90°
      *c Upper Side *d RH Side
      *e 2 to 7 mm (0.0787 to 0.276 in.) - -
      1. Connect the flow shutting valve (water by-pass hose assembly) to the water by-pass outlet sub-assembly and slide the clip to secure it.
        NOTE:
        • Make sure to slide the flow shutting valve (water by-pass hose assembly) until it contacts the hose stopper of the water by-pass outlet sub-assembly.
        • Make sure that the tabs of the clip are within the area shown in the illustration.
    3. GTY1076266Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Torque: 13 N.m (133 kgf/cm, 10 ft.lbf) 

    4. GTY1076291Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Torque: 19 N.m (194 kgf/cm, 14 ft.lbf) 

    5. GTY1076478Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Protrusion *b Cutout
      *c Retainer - -
      Push Push in
      1. Connect the inlet heater water hose connector to the flow shutting valve (water by-pass hose assembly).
        NOTE:

        Check that there is no damage or foreign matter on the connecting parts of the water lines.

        1. Align the protrusions of the inlet heater water hose connector with the cutouts in the flow shutting valve (water by-pass hose assembly) and securely insert the inlet heater water hose connector to the stopper of the pipe.
        2. Push in the retainer.
        3. Check that the flow shutting valve (water by-pass hose assembly) and inlet heater water hose connector are securely connected by pulling on them.
    6. GTY1077285Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Protrusion *b Cutout
      *c Retainer - -
      Push Push in
      1. Connect the outlet heater water hose connector to the No. 2 water by-pass pipe sub-assembly.
        NOTE:

        Check that there is no damage or foreign matter on the connecting parts of the water lines.

        1. Align the protrusion of the No. 2 water by-pass pipe sub-assembly with the cutout in the outlet heater water hose connector and securely insert the outlet heater water hose connector to the stopper of the pipe.
        2. Push in the retainer.
        3. Check that the No. 2 water by-pass pipe sub-assembly and outlet heater water hose connector are securely connected by pulling on them.
    7. GTY1078636Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSTALL FLOW SHUTTING VALVE (NO. 1 WATER BY-PASS HOSE) 

    Refer to INSTALLATION [11/2021 - ] 

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